Experimental realization and finite element simulation of residual stresses in Al-Si water sprayed cast components
(English)Manuscript (preprint) (Other academic)
In this study, experiments were carried out to develop insights into and understanding of the residual stresses that can arise during different thermal treatments of Al-Si components. The study consisted of two steps: experimental measurement of the residual stresses accumulated in the components and simulation of the results by finite element analysis. A special cooling apparatus was designed and built in order to perform selective cooling of the component. In the simulation step, the tensile behavior and parameters such as Young’s modulus values determined by tensile tests at different temperatures and the recorded cooling curves in the first step were used as input for the Abaqus software. The experimental results obtained by thermal analysis and residual stress measurement showed that by choosing a specific holding temperature before quenching, the value of residual stress increases linearly with flow rate of water spray coolant. On the other hand, for a constant value of cooling water flow rate, the maximum temperature difference between the middle and side bars of the test specimen (ΔTmax) and residual stress level decrease when the value of starting temperature of cooling decreases. It was shown that the strain gage method and thermal analysis are reliable techniques for measuring thermal residual stresses and prediction of residual strains in Al-Si components, respectively. It was also shown that the results obtained by simulation are reasonably in acceptable agreement with the experimentally measurements.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-70098OAI: oai:DiVA.org:liu-70098DiVA: diva2:435499